2024 09 5 coordination

IBPSA Modelica Working Group

Date: September 5, 2024, 8:00 - 9:00 Pacific Times.

The purpose of this meeting is to coordinate the Modelica IBPSA Working Group.

Meeting information

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Agenda

Miscellanous (--)

Presentation from Fabian on CI-pipeline of AixLib with automatic check for naming guidelines. Potential extension to IBPSA library.

Building Simulation 2025 abstract

ATES model (Alessandro Maccarini)

ISO 13790 models (Alessandro Maccarini)

PV collector, battery and electrical component models (Laura Maier)

New state selection (Michael Wetter)

Refactor actuator travel time (Michael Wetter)

Integration of new models into the library

OpenSCALING project updates

Progress on pull requests, https://github.com/ibpsa/modelica-ibpsa/pulls

Participants

| Michael Wetter, LBNL | Casper Fu, LBNL | Ettore Zanetti, LBNL

Minutes

Fabian presentation discussion

Building Simulation 2025 Paper

Michael will come out with an outline to be shared. Each library could have a paragraph/page to show those integrated simulations.

ATES model

Received a first set of simulation results from TU Delft to start the validation process. They used the tool SEAWAT. The idea is to define a few simulation scenarios and compare the simplified Modelica model with SEAWAT. Work in progress.

ISO 13790 models

Alessandro finalized the PR, Jelger will find some time to review. If he cannot Louis and Lucas can chip in.

PV collector, battery and electrical component models

No updates.

New state selection

https://github.com/ibpsa/modelica-ibpsa/issues/1412

Michael work on model initialization? Difference of pressure instead of absolute pressure (in theory is better, in numerical simulation it seems inconclusive it depends on the models, scaling seems to work better) Comparison speed vs accuracy? (speed and if models actually run). Maybe use bounded attribute of real variables.

OCT has been updated and it is a work in progress.

Refactor actuator travel time

See issue #1926.

Integration of new models into the library

New models to be developed/integrate:

• Discussions about others and future development, such as
  • APPROVED
    • enthalpy and energy recovery wheel (Oakridge national lab is working on a model for the Buildings that could be integrated)
    • validation of models (No updates)
    • CDL integration (No updates)
    • preconfigured controls (No updates)
  • NEED MORE DISCUSSION
    • NEW: Zoned borefields (https://github.com/lbl-srg/modelica-buildings/pull/3812)
    • thermal storage (No updates)
    • better dynamic ground coupling of long district pipes (PR merged into Buildings, to be moved to IBPSA)
    • CHP and organic Rankine cycle (Casper is working on a PR for Buildings library)
    • more geothermal (horizontal loop, slinky loop, others) (Massimo could look into specific modelling efforts that have been done by co-workers)

OpenSCALING project updates

Kick-off meeting in November. If interested in an advisory board work with Oliver Lenord to issue NDA contract. Come up with requirements:
data source large models (compilation, simulation, optimization, UQ) provide library of models computationally expensive ones numerically problematic ones (see also https://ibpsa.github.io/modelica-challenge-problems/)

New action items

Previous action items